package com.lzq.leetcode.lanqiao;

import java.util.HashMap;
import java.util.Scanner;

public class s4 {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = Integer.parseInt(scan.next());
        //在此输入您的代码...
        // 奇数位个数
        int m = (n + 1) / 2;
        // 从n个数字中选取m给数字

        scan.close();
    }


}
